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Originally Posted by stevenrp
96 XLT AWD.
Recently the Check Engine light popped on and hasn't come off. Scanned it; results said a vaccum leak.
-Steven
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Was it P0171 and P0174? These are noted for intake gaskets, vacuum hoses. if you can find the source of vacuum leak, codes can be repaired. Use somr carburetor cleaner to assist in the vacuum leak. When you find a leak, the engine will run differently. Good luck.